A mother. A daughter. Three possible fathers. Sounds like a typical soap opera, but in fact it's the story behind the musical sensation Mamma Mia. With the timeless songs of ABBA, this lively, entertaining play is a must see when it arrives in Boston this summer at the Colonial Theatre (2 tickets). And, to make your trip up north even more fun, go in style with a two-day car rental from Thrifty Car Rental's Warwick RI location. It will be a day you won't forget, but just beware -- you might be humming Dancing Queen for months to come.